The correct answer among the choices provided is option A. Lung capillaries are responsible for exchanging carbon dioxide for oxygen from the air. Blood that comes from the heart gets oxygen from the alveoli. The carbon dioxide in the blood goes into the alveoli at the same time.
Some molecular studies point to amphibians descending from the lung fish, the Diponi.
Under the class Amphibia, amphibians are tetra-pod, cold blooded vertebrates without having scales. Protein is produced by the special skin of Amphibians.
Lung fish belong to the subclass of Diponi, these are living air breathing species.
A functional adaptation is any adaptation that helps an organism survive.
Hence, the correct answer is option D - the color and shape of a flounder allow it to camouflage.
This adaptation allows animals to camouflage with colors, patterns, and body shapes. Both predators and preys can process camouflage.
